[boxermania]

If my recollection does not fail me in the racing circles it has been established that one point increase in compression equals a 4% increase in power.

So just to apply the formula if we have a 210 chp engine at 9.5 compression that engine should produce right around 218 chp at 10.5 compression and just to add another twist, if you run a synthetic oil like Redline or Royal Purple you should gain another ~1%.

Just to fatten the pot.........enjoy